They said the student of class-XI was teased and her mother beaten up by the youths at Bijoynagar last night when she was returning home with her.
The 17-year-old girl lodged a complaint with Barasat police station and the youths were arrested, the police said.
The girl slapped a boy among the group when he passed lewd comments at her and went to lodge the complaint with the police.
A local court remanded the youths to 14 days jail custody.